You could install the proprietary add-on that landyman linked, or you could install this one, assuming you don't already have it: https://addons.mozilla.org/en-

You could install the proprietary add-on that landyman linked, or you could install this one, assuming you don't already have it: https://addons.mozilla.org/en-US/firefox/addon/3682 https://addons.mozilla.org/en-US/firefox/addon/3682 Then just go to www.google.com/custom and make that your default firefox search. I found this solution more elegant, as I already used the add-on.